1. A preparation method of a pultrusion type polyurethane fiber reinforced composite material is characterized by comprising the following steps: and (2) enabling the head of the glass fiber which is dried by the impregnating compound and has the mass fraction of 50-85% to pass through the mold, injecting the instantly synthesized polyurethane resin into a glue injection soaking area of the mold in a high-pressure mode through a polyurethane resin glue injection system, and completely soaking the continuous fiber in the glue injection soaking area by the high-pressure polyurethane resin to obtain the preformed continuous fiber reinforced composite material.

2. The method of preparing a pultrusion type polyurethane fiber reinforced composite material as set forth in claim 1, wherein: the impregnating compound consists of a coupling agent, a lubricant, a film forming agent A, a film forming agent B, an antistatic agent, a pH regulator and deionized water, wherein the mass consumption of each component in the total mass of the impregnating compound is as follows: 1-8% of coupling agent, 1-15% of lubricant, 1-8% of film-forming agent A, 2-16% of film-forming agent B and 2-18% of film-forming agent C; 1-6% of antistatic agent, 0.1-5.0% of PH regulator and the balance of deionized water.

3. A method of producing a pultrusion polyurethane fiber reinforced composite material as set forth in claim 2, characterized in that: the coupling agent is a silane coupling agent, the lubricant is a mixture of a cationic lubricant and a nonionic lubricant, and the film-forming agent A is epoxy modified polyester emulsion; the film forming agent B is a low molecular weight PVAC emulsion; the film forming agent C is aliphatic polyether type polyurethane resin emulsion, and the antistatic agent is an inorganic salt antistatic agent.

Background

The glass fiber reinforced composite material in the market at present is mainly a composite material taking glass fiber and polyurethane as matrix materials. As one of the composite materials, the glass fiber reinforced composite material has been widely applied in the related industries of aerospace, railway, decorative building, home furniture, building materials, bathroom, environmental sanitation engineering and the like due to the unique performance advantages.

Disclosure of Invention

The invention aims to provide a preparation method of a pultrusion type polyurethane fiber reinforced composite material, wherein the head part of 50-85% of glass fiber dried and cut by a wetting agent passes through a mould, and polyurethane resin synthesized in time is injected into a glue injection permeation area of the mould in a high-pressure mode through a polyurethane resin glue injection system, so that continuous fibers in the glue injection permeation area are completely soaked by the high-pressure polyurethane resin, and a preformed continuous fiber reinforced composite material is obtained;

the impregnating compound consists of a coupling agent, a lubricant, a film forming agent A, a film forming agent B, an antistatic agent, a pH regulator and deionized water, wherein the mass consumption of each component in the total mass of the impregnating compound is as follows: 1-8% of coupling agent, 1-15% of lubricant, 1-8% of film-forming agent A, 2-16% of film-forming agent B and 2-18% of film-forming agent C; 1-6% of antistatic agent, 0.1-5.0% of PH regulator and the balance of deionized water.

The coupling agent is a silane coupling agent, the lubricant is a mixture of a cationic lubricant and a nonionic lubricant, and the film-forming agent A is epoxy modified polyester emulsion; the film forming agent B is a low molecular weight PVAC emulsion; the film forming agent C is aliphatic polyether type polyurethane resin emulsion, and the antistatic agent is an inorganic salt antistatic agent.

The invention has the following beneficial effects of realizing real-time control on the viscosity of polyurethane, thereby ensuring good impregnation of fibers, realizing real-time control on the gelation time of the polyurethane, facilitating the start-stop control of a production line, realizing rapid real-time control on polyurethane polymerization and further improving the forming speed.

Detailed Description

The technical solution of the present invention is further described below by specific examples, but the scope of the present invention is not limited thereto.

The impregnating compound used in the embodiment of the invention comprises the following components: the coupling agent is a mixture of a methacryloxy silane coupling agent and an amino silane coupling agent, and the mass ratio of the two is 4: 1, produced by Tengflood company, the product brands are KH-570 and A-1100 respectively;

the lubricant is water-soluble modified alkyl compound emulsion which is purchased from neutralization chemical company Limited in Yixing city, and the product brand is BX 005;

the film forming agent A is water-soluble epoxy emulsion, which is produced by neutralization chemical limited company in Yixing city, and the product code is P-70;

the film forming agent B is nonionic polyurethane resin emulsion which is purchased from COIM company of Italy and has the product name and code number of BX 017;

the pH value regulator is acetic acid which is purchased from neutralization chemical company Limited in Yixing city, and the product brand is glacial acetic acid.

Example 1

A preparation method of a pultrusion type polyurethane fiber reinforced composite material comprises the steps of enabling the head of glass fiber which is dried by a wetting agent and has the mass fraction of 50% to penetrate through a mold, injecting immediately synthesized polyurethane resin into a glue injection soaking area of the mold in a high-pressure mode through a polyurethane resin glue injection system, and enabling continuous fibers in the glue injection soaking area to be completely soaked by the high-pressure polyurethane resin to obtain a preformed continuous fiber reinforced composite material;

the impregnating compound consists of a coupling agent, a lubricant, a film forming agent A, a film forming agent B, an antistatic agent, a pH regulator and deionized water, wherein the mass consumption of each component in the total mass of the impregnating compound is as follows: 1% of coupling agent, 1% of lubricant, 1% of film forming agent A, 2% of film forming agent B and 2% of film forming agent C; 1% of antistatic agent, 0.1% of pH regulator and the balance of deionized water.

The coupling agent is a silane coupling agent, the lubricant is a mixture of a cationic lubricant and a nonionic lubricant, and the film-forming agent A is epoxy modified polyester emulsion; the film forming agent B is a low molecular weight PVAC emulsion; the film forming agent C is aliphatic polyether type polyurethane resin emulsion, and the antistatic agent is an inorganic salt antistatic agent.

Example 2

A preparation method of a pultrusion type polyurethane fiber reinforced composite material comprises the steps of enabling the head of a glass fiber which is dried by a wetting agent and has a mass fraction of 85% to penetrate through a mold, injecting immediately synthesized polyurethane resin into a glue injection soaking area of the mold in a high-pressure mode through a polyurethane resin glue injection system, and enabling continuous fibers in the glue injection soaking area to be completely soaked by the high-pressure polyurethane resin to obtain a preformed continuous fiber reinforced composite material;

the impregnating compound consists of a coupling agent, a lubricant, a film forming agent A, a film forming agent B, an antistatic agent, a pH regulator and deionized water, wherein the mass consumption of each component in the total mass of the impregnating compound is as follows: 8% of coupling agent, 15% of lubricant, 8% of film forming agent A, 16% of film forming agent B and 18% of film forming agent C; 6% of antistatic agent, 5.0% of pH regulator and the balance of deionized water.

The coupling agent is a silane coupling agent, the lubricant is a mixture of a cationic lubricant and a nonionic lubricant, and the film-forming agent A is epoxy modified polyester emulsion; the film forming agent B is a low molecular weight PVAC emulsion; the film forming agent C is aliphatic polyether type polyurethane resin emulsion, and the antistatic agent is an inorganic salt antistatic agent.

By adjusting the relative contents of the components, products with different properties can be obtained, and the effect of example 2 is better. The foregoing is a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should be considered as the protection scope of the present invention.